Duplicator



April 7, 1925. 1,532,925

J. E. NORMAN DUPLICATOR FleCLMay 10, 1925 liz/wwf.

Patented Api. 7, l925.

JOHN EDVTARD NORMAN,

or Laicnsrnn, ENGLAND.

DUILICATOR.

Application filed May 10,

T0 all whom t may concer/n.:

Be it known that I, JOHN EDWARD Non- MAN, subject of the King of GreatBritain, residing` at Leicester, in the county of Leicester, England,have invented certain new and useful Improvements in or Relating toDuplicators, of which the following is a specication, reference beinghad therein tothe accompanying drawing.

'Iliis invention relates to duplicators which are employed for thepurpose of producing copies of written or printed matter and it embodiesimprovements designed for the purpose of facilitating and simplifyingthe holding together of the several elements or component parts of theduplicator during the time it is being used in the production ofduplicate copies and for subsequent'- ly releasing the said elements orcomponents when it is desired to vchange or renew any of the latter.

The invention will `be more readily understood and appreciated, when, ashereinafter, it is described in reference to particular types ofduplicators although it should be understood that these'are `given asexamples and not as indicating that the invention is restrictedthereto.v

A well known type of duplicator coniprises a shallow rectangular trayhaving an upturned edge on each side and containing within on the bottomthereof a felt or equivalent absorbent pad which is saturated with inkor equivalent and hereinafter desig-l nated the ink pad.

Resting on the said ink pad is a thin metallic plate furnished withclosely positioned small perforations through which the ink from the inkpad when the usual pressure is applied` can eXude.

Over thisv perforated plate a linen or like porous sheet is placed andwhen this has become uniformly charged with the inl; ez;-

r truded from the perforated plate, a stencil usually consisting of awaxed sheet, is placed thereover.

The matter, of which copies are to be made is generally produced uponthe stencil by a typewriter or by a stylo in the manner well understood,the ink from the porous sheet penetrates through the stencil at theparts from which the wax has been removed 1923. Serial No. 637,951.

by the typewriter orvstylov and vwhen a plain blanlr sheet is placedthereover'andpressure applied to it, as for example by passing a handroller over it, the copy ofthe stencil is transferred to the plain`sheet as lwill be understood. n l It is Ifor the purpose of locking orholding` together the her-einbefore-mentioned elements or components, ofthe duplicator that the present invention is designed therebypreventing` them becoming disturbed in their relation to eachotlierfeither accidentally or as the result of'manipulation during thetime the copies arebeing produced. v

According to the invention the locking and releasing means for thecomponents of the duplicator comprise a rod orl equivalentextending'across one or each end of the said components arranged inbearings at itsopposite ends so that it can be rotatedl and operate withan eccentric movement' to clasp and release .the components thedistinguishing feature being that said rod or equivalent holders andthelike, aclampconsisting of a rotatable eccentric, eccentrical-lymounted roller or similar cam device zmounted in a frame or holder hasbeen proposed and I do vnot therefore claim any such device per se.

In the former suggested arrangements however7 lthe rotatable eccentricclamp device has notbeen Aadapted for-removal without detachament ordisturbance of at least one4 of its bearings. My invention concerns theapplication of a clamp device of such known form to a duplicator, thenovelty residing in the means I' adopt for permitting ready detachmentof the device from its bearings.

in order that it may', when desired, `be vremoved from the duplicator,such for zexample as to permit removal `of the components lfrom the,tray or arrangement of the same therein. f

In order that my invention may be clearly understood reference will nowbe made to the accompanying drawing which shows some practicalexamplesthereof.

v is mounted in such a manner that it can-be.vv

- nal pins z yFigure l is a plan of a duplicator having aconvenient andthe preferred form of the invention applied thereto.

Figure 2 isiafftransverse section! on the .line

aairotflrigure712.4 i

v Figure 3 is an elevation of an alternative form of the lookmgnieans.

Figure et is an end vievv ofthe locking" element.

Figure 4 is drawn to la larger scale than the rest of the iguresgand-,vlilreeparts -are ,p designated by the 'same reference charactersinithe. 'severalzguresa 'M lyfdescribedehereinais:depicted in Figures lland vi 2@ Where V-1 fis :the .rshall'oviry :rectangular traywlthnupturned ledges; 2iisx-tl1e ffeltor equivalent absorbent pad, 3 isz:the thin lmetallicaperforatedqolatefand@ /lfwis the linen f2()--onlikefporousfsheetiupon Which'the stencil '(notishown.) isfplaeedl.` vv For firmly holding. :the absorbentpad, perforet-edf!plate,` .porousssheet and-v stencil in position; inthe trayi locking-means are pro-251fv-ide`dand c'ompriseaa rody '5 extending facross yone 'or leachienddofithe 'saidfelements and jformed iintegrallytherewvith lorattached to 'feaohi-endf thereof iszza projecting pinf 6 out of'coneentricityf"nzithsr'the axis ofsaid rod.

' 3U Bearingsare formed inf-*the'ftray-orthe said eccentnicxpins fWihioh `may'conveniently take or fequlivalentzrisrrigidly' secured tovthe rod( 5 iat a point antermed-rate :of i[its iends,` its' positionisvviithiln -the ,-duplic-ator, and

, can be readily moved throue'lr'an arek of a i mferrol'et'ooperatief-.themed tohear and 'exert "aadownvvard pressiirefnpoiifatliesaid'lelements to rloek or `4=clamp 'thennz and i also to. AreleaseAthepressure upon1 the lsaidI lelements so that they' f'can'fs befmanipulated as -niay `be neces- As yafn'odifi'oatiorr;:instead vofmounting .the "lockingrand;releasing;r rod eecentrically in i tsfibearings l it 'may l'be mounted concentric ally thereinglin" vvfhi'chfcase 'it :takes fthe :forni y of'theA rod i6 shown: iinf Figuref 'and.has -ecfcentries-f'a fastupon -itiat intervals apart toexert-pressureiuponf.the partslto. be. held w =`When1thefsaid rod'fisgiven a partial ro-v taryzmovement by" means, ol the-stud 8. fr lny l ,v,ifen'd view the locking fme'ansshown-1in Fiqures Qan'dfianeftthersameas represented' in The invention' `consistsy ini aconstruction and arrangement 'offfthenp'ressure rodwsothat I' 601 it canbe readilv detached'.` from its floearingsy a-ndf front ithe=dnp'licatori When'fit `(is desired tofdoison In fthe redierredi'arrantigenient,l@the j our-` connected-to said tray .A stud, piu

so that p Brute. 6 omritheeoppnsite endseoitftherod 5 ,i

in the construction shown in Figures l and 2, and the opposite ends ofthe rod 62L in the vconstruction shovvn in Figure 3, are of ditterentlengthsA as shown so that an endivise movement oi' the said rod Willeffect the positioning or removal ofthe rod from its bearing. Forinstance, when placing the rod in position the'long'er pin or end isirst insertedl in its hearing and then by an endvWise movement of therod the shorter pin V'can also bepassed into. its bearingrv which ineach case is formed in the shape of an eye or circular aperture. Tovremovewthe rod from the trayit'iis lmoved .endiviseftowvards theright=to disengage the shorter pin or end from the hearing` and then it islifted and Withdrawn lroin the other bearing. by an endivise: movementto .the left.'l

lVhile y the invention has 4been hereinbe'fore described in reference-toapartioularitype oi" duplicator it is'not lintended .that it shall helimited thereto, as it mayequally Well be applied .to other types ofyduplicators in which a series yoit'superposed iiat elements areeinpl'oyed. For example it may be applied to Aa. duplicator or the kindcomprisinga flat metal plate orholderya seriesof blank sheets superposedand interleaved With carbon sheets and -a top blank sheet rupon whichthe matter is Written by a. pencil or stylo so that corresponding copiesare produced upon the i1iterven in` blankxsheetsby pressure ot thepencilor stylo upon the interleaved carbon vsheets as is Well understood.

'eccentric movement upon :the components,

member beingvprovided with said clamp journal pins oi ditle'rentlengthsatits oppositeends for permittingvits insertion and removal into andremits bearings.

llO

2. In `a duplicator ofthe ltype wherein a pluralityotcoinponentsor.elements of the kind herein referred to lreduire to beheld together, locking and releasing means for said componentscomprising a. rod'extending; aerossfthe componentsarranged in bearingsat its opposite ends so that it can be rotated landoperatewith aneccentricimovcl ment :to clamp and yrelease .the components, said rodbeing` provided vWith'journal pins of dii'erentilength.at its oppositeends for permitting insertion and removal of the rod intoand` Vfrom itsbearings.

In testimony whereof I my signa- IJOHN fnnrvann NORMAN

